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Honestly I don't feel there is any need to run Java in containers. The war/jar file is its own container with its own dependencies. The JVM still makes the same syscalls as it would inside a Docker/Kubernetes container.

In fact I would rather look at serverless architecture before considering docker/Kubernetes.

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when you run a polyglot stack with java/python/go/node on top of a cluster of machines, you will love to have them containerized and uniform. It makes scripting and CI so much easier.

or, when you have a legacy app that relies on java 6, but you want everything else to run on java 8, the ability to drop everything into a container with its runtime is a life saver.

source: I'm the devops person that's responsible for making this work

We already run a polyglot stack at our company, and we use Docker(nvidia-docker) for our Python environment. With Java there is no need, and it is a lot less work updating and upgrading the JVM and our Java applications. I would use Docker for Java 6 though.

cgroup limits can still be beneficial, consider for example contraining the (by default unlimited) metaspace.

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